package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo02 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis=new FileInputStream("cxk.jpg");
        FileOutputStream fos=new FileOutputStream("ikun.jpg");

        long start=System.currentTimeMillis();
        byte [] data=new byte[1024*10];
        int len;//记录读取的字节个数
        while((len=fis.read(data))!=-1){
            fos.write(data,0,len);//读多少，写多少
        }
        long end=System.currentTimeMillis();
        System.out.println("复制成功，耗时"+(end-start)+"ms");
        /*
        FileInputStream fis=new FileInputStream("cxk.jpg");
        FileOutputStream fos=new FileOutputStream("ikun.jpg");

        long start=System.currentTimeMillis();
        byte [] data=new byte[1024*10];
        while(fis.read(data)!=-1){
            fos.write(data);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制成功，耗时"+(end-start)+"ms");

         */
        fis.close();
        fos.close();
    }
}
